[breck]

What's causing it to crash, the left panel or the right?

Are you using CodeMirror for the left panel?

[loggerhead]

The issue isn't with the editor itself, but rather because rendering becomes very time-consuming when there are too many DOM nodes. This is due to the specification limiting to only one main UI thread.

[breck]

You should learn webgl and do particle rendering.

[loggerhead]

Thanks. The main issue is that we can't reuse existing components, so the development workload will be quite large, but I'll think about it.